import os
import time
 
 
def main():
    str = '大哥大哥欢迎你，欢迎你来我这里      '
    while True:
        print(str)
        time.sleep(0.2)
        str = str[1:] + str[0:1]
        # for Windows use os.system('cls') instead
        os.system('clear')
 
 
if __name__ == '__main__':
    main()